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Full Discussion: "sed" command is not working in shell script
Top Forums Shell Programming and Scripting "sed" command is not working in shell script Post 302315364 by askumarece on Tuesday 12th of May 2009 07:09:48 AM
Old 05-12-2009
"sed" command is not working in shell script
Hi All,

I am not much strong in shell scripting...
I am using sed command in my script to find and replace a string.......

This is how script looks :
#############
#!/usr/bin/ksh

CONFIG_FILE=iom_test.txt
FIND=`echo "NIS_FTP_SERVER1=123.456.iom.com"`
REPLACE=`echo "##NIS_FTP_SERVER1=123.456.iom.com"`
export CONFIG_FILE FIND REPLACE;

## Replace all Special characters[#, _, ., and =] and store it back to FIND
NEW_FIND=`echo "$FIND" | sed 's/\#/\\\#/g' | sed 's/\_/\\\_/g' | sed 's/\=/\\\=/g' | sed 's/\./\\\./g'`
FIND=$NEW_FIND

NEW_REPLACE=`echo "$REPLACE" | sed 's/\#/\\\#/g' | sed 's/\_/\\\_/g' | sed 's/\=/\\\=/g' | sed 's/\./\\\./g'`
FIND=$NEW_REPLACE

echo "sed -e 's/^$FIND/$REPLACE/g' $CONFIG_FILE"
mv $CONFIG_FILE $CONFIG_FILE.old
sed -e 's/^$FIND/$REPLACE/g' $CONFIG_FILE.old > $CONFIG_FILE
echo "Changes are done"

###########

Here my pb is, I am not getting any error but it is not doing any changes with sed command....
But if I give the sed command directly in the shell that works perfectly
like :
sed -e 's/^\#\#NIS\_FTP\_SERVER1\=123\.456\.iom\.com/##NIS_FTP_SERVER1=123.456.iom.com/g' iom_test.txt

Can anyone pls help me out??
Thanks in advance
 

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LEARN ABOUT REDHAT

nwbpset

NWBPSET(1)							      nwbpset								NWBPSET(1)

NAME

       nwbpset - Create a bindery property or set its value

SYNOPSIS

       nwbpset [ -h ] [ -S server ] [ -U user name ] [ -P password | -n ] [ -C ]

DESCRIPTION

       nwbpset Reads a property specification from the standard input and creates and sets the corresponding property. The format is determined by
       the output of 'nwbpvalues -c'. nwbpset will hopefully become an important part of the bindery management suite of ncpfs, together with

       As another example, look at the following command line:

	 nwbpvalues -t 1 -o supervisor -p user_defaults -c |
	 sed '2s/.*/ME/'|
	 sed '3s/.*/LOGIN_CONTROL/'|
	 nwbpset

       With this command, the property user_defaults of the user object 'supervisor' is copied into the property login_control of the user  object
       'me'.

	 nwbpvalues -t 1 -o me -p login_control -c |
	 sed '9s/.*/ff/'|
	 nwbpset

       This command disables the user object me.

       Feel free to contribute other examples!

       nwbpset looks up the file $HOME/.nwclient to find a file server, a user name and possibly a password. See nwclient(5) for more information.
       Please note that the access permissions of $HOME/.nwclient MUST be 600 for security reasons.

OPTIONS

       -h
	  -h is used to print out a short help text.

       -S server
	  server is the name of the server you want to use.

       -U user
	  user is the user name to use for login.

       -P password
	  password is the password to use for login. If neither -n nor -P are given, and the user has no open connection to  the  server,  nwbpset
	  prompts for a password.

       -n
	  -n should be given if no password is required for the login.

       -C
	  By default, passwords are converted to uppercase before they are sent to the server, because most servers require this. You can turn off
	  this conversion by -C.

AUTHORS

       nwbpset was written by Volker Lendecke. See the Changes file of ncpfs for other contributors.

nwbpset 							     8/7/1996								NWBPSET(1)
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